m 



INDEX. 



1'ACIC. 



Dichocrinus liueatus 440 



Dichocrinus pisum 441 



Discina nitida 572 



Dithy rocaris carbonarius 619 



Dorycrinns 379 



Dorycrinus canaliculatus 381 



Dorycrinus intermedins 385 



Dorycrimis Roemeri 383 



Dorycrinus unicoruis 383 



Drift ,4,30,62,79,84,97, 107, 136, 145 



Edinondia ovata PI. 26, Fig. 13 



Edmondia pei'oblonga 583 



Entoliuin aviculatum 588 



Eocidaris squamosus 478 



Eretmocriuus 368 



Erisoerinus 445 



Erisocrhius antiquus 447 



Erisocrinus ty pus 561 



Erisocrinus Whitei 448 



Euomphalus peraodosus 604 



Euomphalus subrugosus 607 



Euoinphalus subquadratus 605 



Eupachycriims Fayettensis 565 



Eiipachycriniis Boydii 554 



Eupachycriiius t nberculatus 566 



Forbesiocrinus Wortheni 496 



Fnsuliua gracilis 560 



Fusulina ventricosa : 560 



Galena Limestone 17, 36, 66, 76, 86, 99, 111, 129, 



[154, 279 



Galva coal mines, section of 196 



Geneseo shaft section of 198 



Glacial Theory 5 



Goniasteroidocrinus 324 



Goniasteroidocrinus obovatus 391 



Goniasteroidocrinus teuuiradiatua 389 



Goniatites compactus 617 



Granatoeriniis glaber 537 



Granatocrinus granulosus 508 



Granatocrinus melouoides 468 



Granatoerinus neglectus 471 



Gianatocrinus Norwood! 473 



Granatocrinus pisum 470 



GraphiocrinuH dactylus 559 



Hamilton Limestone 187, 222. 227 



Hemipronito.-j crassns 570 



Henry county, geology of 185 



Henry county, Coal Measures of 188 



Henry county, econom. geology of 200 



Hydraulic Limestone 283 



Indian antiquities 93, 102. 165 



Jo Daviess county, geology of 27 



Jo Daviess county, mining processes in 52 



Jo Daviess county, econom. geology of 39 



Keokuk Limestone. 261. 277 



Kiuderhook group 279 



Lee county, geology of, 124 



Lee county, econom. geology of 137 



Lima retifera ... 588 



Lingula my tiloides 572 



Lithophaga pertenuis 539 



I,<i',ss and modiHed drift 29, 144, 171, 236 



Lophopliylluin proliferuni 560 



Loxonema semicostata 596 



Macoupin county, geology of 286 



Macoupm county, surface geology of 286 



Macoupin county, Virden shaft, section of 287 



Macoupin county, Carliuville shaft, section of 289 

 Macoupin county, Stauntou shaft, section of... 21)2 

 Macoupin county, Bunker Hill shaft, sect'n of. 292 



Macoupin county, Apple creek section 2!I7 



Macoupin county, ecouom. geology of 301 



Macrocheilus Altonensis 593 



Macrnclicilus Ncwbciryi . r i!(4 



Macrndon deliratus 575 



Macrodon tenuistriatus 576 



Marble _'.-.> 



Marshall county, genlogy of. i;i)-2 



Mai shall county, Coal Measures of. 204 



Marshall county, econom. geology of 209 



McDonough county, geology of 253 



McDonnugh county. Coal Measures of. 255 



McDonough county, Uushnell boring 259 



M< Douough county, Prairie City boring 259 



McDouongh county, econom. geology of -Jill 



Megistocriuus 3!3 



Megistocrinus parvirostris 396 



Megistocrinus AVhitei , 397 



Meekella Striato-costata 571 



Microdonia conica. . . '. 598 



Monotis gregaria 573 



Monroe county, geology of. 266 



Moiiroe county, formations of 270 



Monroe county, Coal M easures of 270 



Monroe county, econom. geology of 281 



Murchisonia inornata 599 



Myalinaperattenuata 582 



Myalina St. Ludovici 540 



Xaticopsis Altonensis 595 



isaticopsis subovatus 595 



Xaticopsis Wheeleri 51)5 



Xaticopsis ventricosus 592 



Xautilus collectus 544 



Xautilus Coxanus 543 



Xautilus disciformis 522 



Xautilus Lasallensis 610 



Xautilus latus 608 



Xautilus Leideyi 524 



Xautilus Xiotensis 523 



Xautilus planovolvis PI. 30, Fig. 3 



Xautilus Winslowi 609 



Xiagara Limestone.. 15, 33, 64, 78, 132, 149, 187, 223 



Xipterocrinus 434 



Xipterocriuus arboreus 43ti 



Ni]>terocrinus \V:tchsmntlii 43."i 



Xorthwestcrn Illinois, geology of 1 



